Building-block.



No. 781,413. PATENTED JAN. 31, 1905.

. e F FISHER BUILDING BLOCK.

APPLICATION IILBD SEPT. 14, 1904.

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' fliiarlwym UNITE STAT-Es Ifatented January 31, 1905.

PATENT OFFICE.

BUILDING-BLOCK.

SPECIFICATION forming part of Letters Patent No. 781,413, dated January 31, 1905.

To all whom it may concern;

Be it known that I, GEORGE F. FISHER, a citizen of the United States, residing at North Tonawanda, in the county'of Niagara and State of New York, have invented certain new and useful Improvements in Building-Blocks, of which the following is a specification.

My invention relates to improvements in building-blocks, and more particularly to hol.- lowbuilding-blocks. I i l The objects of my invention are to construct a hollow building-block that can be molded in a moldingpress; to provide "a hollow building-block with inclosed sides and ends, which prevents the circulation ofair through the wall; to provide a hollow block which by reason'of its construction receives afull bearing from the blocks directly beneath and provides a full bearing for the block directly above, while also giving the mortar at the ends of the block full bearing.

Further objects are to provide a separable rower than-the other, and in forming each section with opposing open sides which form a complete hollow block having its sides and ends closed. I

In the drawings, Figure 1 is a sectional per: spective view of a wall constructed of blocks embodying my invention. Fig.2 is a perspective View of one part ofmy improved building-block. Fig. 3 is a perspective view of the other part of my block.

Referring now to the drawings in detail, like letters of reference refer to like parts in the several figures.

The reference-letter A designates the blocks, each comprising two parts B C, the part being'narrower than the part Bto bring the longitudinal seam to one sideof thelongitudinal vertical .center of the wall. Each part of the block is made hollow and comprises an 5 outer wall D, a top wall E, a bottom wall-F,

Application filed $eptember 14-., 1904." Serial No. 2 24381.

and end walls G, thus leaving the inner opposing sides open, with the edges of thetop, bottom, and end wa'lls-of both parts held in contact with each other. This forms a hollow building-block with its sides and ends closed. The part 0 may be maintained at a certain size irrespective of the thickness of the wall, while the part B may be made wider to provide the increased thickness desired. In a wall twelve inches thick the narrow part 0 may be three inches wide and as long as desired, while the wide part is molded to a width of nine inches and to a length corresponding with the length of the narrow part. In the construction of a wall sixteen inches thick the narrow part 0 need not be increased in width, while the wide part may be molded to a width of thirteen inches. It is therefore apparent that it is only necessary to increase the width ofthewi de part of the block when a wall of increased thickness is desired.

When the blocks are molded to a length of twelve inches or more, I provide transverse strengthening-ribs H,'and for convenience in setting the wide part I provide hand-holes I, which permit of conveniently grasping and placing the same in proper position.

' The walls of the blocks I preferably mold v to a thickness of one and one-half inches,

which leaves a slight depressionK in the narrow partand a chamber L in the wide part.

The blocks are reversed in alternate courses to bring the narrow parts thereof in one course between'the wide partsof the blocks in the courses above and below, thus breaking joints and forming a solid structure.

-With the sides and the ends of the blocks closed, inclosed,'and unconnected dead -air chambers are provided within the blocks, which prevent the circulation of air through the wall and render the house'warmer in winrow part thereof between two wide parts, thus breaking joints.

In testimony whereof I have ai'lixed my signature in the presence of two subscribing witnesses.

GEORGE F. FISHER.

Witnesses EMIL N EUHART, JULIUs LAUKES. 

